Hello,
I'm trying to use MySQL from Haskell but it seems impossible for me to
install one of the MySQL packages on my Windows XP machine.
First I tired to install hsql-mysql-1.7.1 on GHC 6.10.3 but installing
haskelldb-hsql failed with a hidden package error. So I added the
old-time package to the cabal file but there still was a compile error
(something due to the change from Exception to Exception e => e).
So I switched to GHC 6.8.3 and tried it again. Now it says:
Configuring hsql-mysql-1.7.1...
Warning: 'extra-lib-dirs: /usr/lib/mysql' directory does not exist.
Warning: 'include-dirs: /usr/include/mysql' directory does not exist.
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package process-1.0.0.1 requires filepath-1.1.0.0
package directory-1.0.0.1 requires filepath-1.1.0.0
package Cabal-1.6.0.3 requires filepath-1.1.0.2
Setup: Missing dependency on a foreign library:
* Missing C library: mysqlclient
This problem can usually be solved by installing the system package that
provides this library (you may need the "-dev" version). If the library is
already installed but in a non-standard location then you can use the flags
--extra-include-dirs= and --extra-lib-dirs= to specify where it is.
There's no Haskell package mysqlclient and I don't know how to install a
C library in Haskell. So I switched to HDBC-2.1.1 and got the next
compile error:
Building convertible-1.0.5...
Data/Convertible/Instances/Num.hs:671:0:
warning: no newline at end of file
[...]
[5 of 8] Compiling Data.Convertible.Instances.C (
Data/Convertible/Instances/C.hs, dist\build/Data/C
onvertible/Instances/C.o )
[6 of 8] Compiling Data.Convertible.Instances.Time (
Data/Convertible/Instances/Time.hs, dist\build/
Data/Convertible/Instances/Time.o )
Data/Convertible/Instances/Time.hs:64:0:
Duplicate instance declarations:
instance Typeable NominalDiffTime
-- Defined at Data/Convertible/Instances/Time.hs:(64,0)-(65,42)
instance Typeable NominalDiffTime
-- Defined in time-1.1.3:Data.Time.Clock.UTC
Data/Convertible/Instances/Time.hs:67:0:
Duplicate instance declarations:
instance Typeable UTCTime
-- Defined at Data/Convertible/Instances/Time.hs:(67,0)-(68,34)
instance Typeable UTCTime
-- Defined in time-1.1.3:Data.Time.Clock.UTC
So please help me, what GHC/package configuration will I need to use
MySQL from my Haskell programs on Windows? I really like Haskell but all
those "broken" packages are really discouraging. :(
Best wishes,
Maciej